Retaining wall block



FIG. 1 is a perspective view of a retaining wall block showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof, the other side being a mirror image of that shown;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a retaining wall block, as shown and described. 